rule win_trochilus_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.trochilus_rat."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.trochilus_rat"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { 8be5 5d c20c00 8b4d08 89480c 8b4d0c }
            // n = 6, score = 100
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   89480c               | mov                 dword ptr [eax + 0xc], ecx
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]

        $sequence_1 = { 033485c02b0110 8b45f8 8b00 8906 8b45fc 8a00 884604 }
            // n = 7, score = 100
            //   033485c02b0110       | add                 esi, dword ptr [eax*4 + 0x10012bc0]
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8906                 | mov                 dword ptr [esi], eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8a00                 | mov                 al, byte ptr [eax]
            //   884604               | mov                 byte ptr [esi + 4], al

        $sequence_2 = { e8???????? 33db 53 57 ffb634010100 ffb630010100 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   33db                 | xor                 ebx, ebx
            //   53                   | push                ebx
            //   57                   | push                edi
            //   ffb634010100         | push                dword ptr [esi + 0x10134]
            //   ffb630010100         | push                dword ptr [esi + 0x10130]
            //   e8????????           |                     

        $sequence_3 = { 395c3004 75c8 ff4f24 8b0430 3bc3 7408 8b10 }
            // n = 7, score = 100
            //   395c3004             | cmp                 dword ptr [eax + esi + 4], ebx
            //   75c8                 | jne                 0xffffffca
            //   ff4f24               | dec                 dword ptr [edi + 0x24]
            //   8b0430               | mov                 eax, dword ptr [eax + esi]
            //   3bc3                 | cmp                 eax, ebx
            //   7408                 | je                  0xa
            //   8b10                 | mov                 edx, dword ptr [eax]

        $sequence_4 = { 8917 894f04 8910 8b5508 85d2 7413 8b4dec }
            // n = 7, score = 100
            //   8917                 | mov                 dword ptr [edi], edx
            //   894f04               | mov                 dword ptr [edi + 4], ecx
            //   8910                 | mov                 dword ptr [eax], edx
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   85d2                 | test                edx, edx
            //   7413                 | je                  0x15
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]

        $sequence_5 = { 5b c3 85c0 7503 8d4204 894104 }
            // n = 6, score = 100
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   85c0                 | test                eax, eax
            //   7503                 | jne                 5
            //   8d4204               | lea                 eax, [edx + 4]
            //   894104               | mov                 dword ptr [ecx + 4], eax

        $sequence_6 = { 8365d800 c745dc97af0010 a1???????? 8d4dd8 33c1 8945e0 8b4518 }
            // n = 7, score = 100
            //   8365d800             | and                 dword ptr [ebp - 0x28], 0
            //   c745dc97af0010       | mov                 dword ptr [ebp - 0x24], 0x1000af97
            //   a1????????           |                     
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   33c1                 | xor                 eax, ecx
            //   8945e0               | mov                 dword ptr [ebp - 0x20], eax
            //   8b4518               | mov                 eax, dword ptr [ebp + 0x18]

        $sequence_7 = { 83c40c 3b4108 7d1d 81beb080000000200000 0f8c09ffffff eb0b 57 }
            // n = 7, score = 100
            //   83c40c               | add                 esp, 0xc
            //   3b4108               | cmp                 eax, dword ptr [ecx + 8]
            //   7d1d                 | jge                 0x1f
            //   81beb080000000200000     | cmp    dword ptr [esi + 0x80b0], 0x2000
            //   0f8c09ffffff         | jl                  0xffffff0f
            //   eb0b                 | jmp                 0xd
            //   57                   | push                edi

        $sequence_8 = { e8???????? 8bf8 85ff 0f84f0000000 0fb7865c010100 6640 8bd7 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   0f84f0000000         | je                  0xf6
            //   0fb7865c010100       | movzx               eax, word ptr [esi + 0x1015c]
            //   6640                 | inc                 ax
            //   8bd7                 | mov                 edx, edi

        $sequence_9 = { bf06020000 57 668985ecfbffff 8d85eefbffff 53 50 c785e0fbffff03000000 }
            // n = 7, score = 100
            //   bf06020000           | mov                 edi, 0x206
            //   57                   | push                edi
            //   668985ecfbffff       | mov                 word ptr [ebp - 0x414], ax
            //   8d85eefbffff         | lea                 eax, [ebp - 0x412]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   c785e0fbffff03000000     | mov    dword ptr [ebp - 0x420], 3

    condition:
        7 of them and filesize < 630784
}